A two$-$year long forward contract on a non$-$dividend$-$paying stock is entered into

when the stock price is $$40$ and the risk$-$free rate of interest is $10\%$ per annum with

continuous compounding.

a$.$ What are the forward price?

b$.10$ months later, the price of the stock is $$30$ and the risk$-$free interest rate is

still $10\%.$ What are the forward price and the value of the forward contract?